[css-grid] Remove solved issues. Fix line name handling of subgrids to match updated proposal.

Author: fantasai

css-grid/Overview.bs

@@ -1479,14 +1479,6 @@ Repeat-to-fill: ''auto-fill'' and ''auto-fit'' repetitions</h5>
 	(This can result in <em>all</em> tracks being dropped,
 	if they're all empty.)
 
-	Issue: In order to simplify implementation and testing requirements for Level 1,
-	the <<auto-repeat>> syntax only accepts a single <<fixed-size>>.
-	Now that we have gutters, most use cases for auto-repetition will need only one track size.
-	However, if there are important use cases for having a full track listing,
-	the CSSWG is not opposed to expanding the syntax;
-	please send such use cases to www-style@w3.org
-	for consideration.
-
 	For the purpose of finding the number of auto-repeated tracks,
 	the UA must floor the track size to a UA-specified value
 	to avoid division by zero.
@@ -2354,18 +2346,10 @@ Establishing Subgrids: the ''subgrid'' 'display' value</h3>
 			(Note: the act of scrolling does not affect layout.)
 
 		<li>
-			If the <a>subgrid</a> has an explicit <a>grid position</a> as well as an explicit <a>grid span</a>,
-			it also automatically receives the line names specified for its parent <a>grid</a>.
-			(In such cases the author can rely on the names specified in the parent grid,
-			and does not need to duplicate those names in each subgrid declaration.)
-
-			Issue: People should review how subgrid line names are assigned, to ensure it is sane and useful.
+			Since <a>subgrids</a> can be placed before their contents are placed,
+			their lines automatically receive the line names specified on the parent <a>grid</a>.
 	</ul>
 
-	Issue: Need to expand grid-auto-rows/columns to allow for multi-track repetition,
-	so you can auto-generate properly-sized subgridded rows
-	in cases such as a catalog listing.
-
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css-grid/issues-wd-20150917.html

@@ -164,13 +164,13 @@ <h1>CSS Grid Layout Level 1 Disposition of Comments for 2015-09-17 WD</h1>
 <span class="a">Closed:   Accepted</span>
 <span>Verified:</span>
 <span>Resolved: Editorial</span></pre>
-<pre class='open ' id='issue-15'>
+<pre class=' a' id='issue-15'>
 <span>Issue 15. <a href='#issue-15'>#</a></span>
 <span>Summary:  Example is confusing</span>
 <span>From:     Manuel Rego Casasnovas</span>
 <span>Comment:  <a href='https://lists.w3.org/Archives/Public/www-style/2015Dec/0110.html'>https://lists.w3.org/Archives/Public/www-style/2015Dec/0110.html</a></span>
-<span>Response:</span>
-<span>Open</span>
+<span>Response: <a href='https://lists.w3.org/Archives/Public/www-style/2016May/0181.html'>https://lists.w3.org/Archives/Public/www-style/2016May/0181.html</a></span>
+<span class="a">Closed:   Accepted</span>
 <span>Verified:</span>
 <span>Resolved: Editorial</span></pre>
 <pre class=' a' id='issue-15'>